General
http://hdl.handle.net/10453/146
Wed, 01 Oct 2014 03:58:15 GMT2014-10-01T03:58:15ZOptimal designs for stated choice experiments that incorporate position effects
http://hdl.handle.net/10453/17961
Optimal designs for stated choice experiments that incorporate position effects
Bush, Stephen; Street, Deborah; Burgess, Leonie
Davidson and Beaver (1977) extended the Bradley-Terry model to incorporate the possible effect of position within a choice set on the choices made in paired comparisons experiments. We further extend the Davidson-Beaver result to choice sets of any size and show, under a mild restriction, that designs optimal for the multinomial logit model are still optimal. Designs balanced for carry-over effects of all orders can be used to construct designs with a diagonal information matrix for attribute effects. The theoretical results are derived assuming equal merits and we discuss the possible consequences of assuming unequal merits in an example.
Sun, 01 Jan 2012 00:00:00 GMThttp://hdl.handle.net/10453/179612012-01-01T00:00:00ZProcesses of class Sigma, last passage times, and drawdowns
http://hdl.handle.net/10453/17960
Processes of class Sigma, last passage times, and drawdowns
Cheridito, Patrick; Nikeghbali, Ashkan; Platen, Eckhard
We propose a general framework for studying last passage times, suprema, and drawdowns of a large class of continuous-time stochastic processes. Our approach is based on processes of class Sigma and the more general concept of two processes, one of which moves only when the other is at the origin. After investigating certain transformations of such processes and their convergence properties, we provide three general representation results. The first allows the recovery of a process of class Sigma from its final value and the last time it visited the origin. In many situations this gives access to the distribution of the last time a stochastic process attains a certain level or is equal to its running maximum. It also leads to recently discovered formulas expressing option prices in terms of last passage times. Our second representation result is a stochastic integral representation that will allow us to price and hedge options on the running maximum of an underlying that are triggered when the underlying drops to a given level or, alternatively, when the drawdown or relative drawdown of the underlying attains a given height. The third representation gives conditional expectations of certain functionals of processes of class Sigma. It can be used to deduce the distributions of a variety of interesting random variables such as running maxima, drawdowns, and maximum drawdowns of suitably stopped processes.
Sun, 01 Jan 2012 00:00:00 GMThttp://hdl.handle.net/10453/179602012-01-01T00:00:00ZMacroeconomic stabilization policies in intrinsically unstable macroeconomies
http://hdl.handle.net/10453/17962
Macroeconomic stabilization policies in intrinsically unstable macroeconomies
Chiarella, Carl; Flaschel, Peter; Koper, Carsten; Proano, C; Semmler, Willi
Many monetary and fiscal policy measures have aimed at mitigating the effects of the financial market meltdown that started in the U. S. subprime sector in 2008 and has subsequently spread world wide as a great recession. Slowly some recovery appears to be on the horizon, yet it is worthwhile exploring the fragility and potentially destabilizing feedbacks of advanced macroeconomies in the context of a framework that builds on the ideas of Keynes and Tobin. This framework stresses the fragilities and destabilizing feedback mechanisms that are potential features of all major markets-those for goods, labor, and financial assets. We use a Tobin macroeconomic portfolio approach and the interaction of heterogeneous agents on the financial market to characterize the potential for financial market instability. Though the study of the latter has been undertaken in many partial models, we focus here on the interconnectedness of all three markets. Furthermore, we study what potential labor market, fiscal and monetary policies can have in stabilizing unstable macroeconomies. In order to study this problem we introduce, besides money, long term bonds and equity into the asset market. We in particular propose a countercyclical monetary policy that sells assets in the boom and purchases them in recessions. Modern stability analysis is brought to bear to demonstrate the stabilizing effects of the suggested policies. The policies suggested here could help the Fed in its search for an appropriate exit strategy after its massive intervention in the financial market.
Sun, 01 Jan 2012 00:00:00 GMThttp://hdl.handle.net/10453/179622012-01-01T00:00:00ZLattice rules of minimal and maximal rank with good figures of merit
http://hdl.handle.net/10453/17951
Lattice rules of minimal and maximal rank with good figures of merit
Langtry, Tim
For periodic integrands with unit period in each variable, certain error bounds for lattice rules are conveniently characterised by the figure of merit rho, which was originally introduced in the context of number theoretic rules. The problem of finding good rules of order N (that is, having N distinct nodes) then becomes that of finding rules with large values of rho. This paper presents efficient search methods for the discovery of rank 1 rules, and of maximal rank rules of high order, which possess good figures of merit.
Fri, 01 Jan 1999 00:00:00 GMThttp://hdl.handle.net/10453/179511999-01-01T00:00:00Z